With HighLine, we've recently moved over to using termios... on Unix  
only.  I set it up as a gem dependancy and this is causing problems  
with the Window's install (and we don't even need it on that  
platform).  That leads me to the following questions:

1.  Is it possible to change dependancies based on the platform?
2.  Will a gem install still if you say no to a dependancy?
3.  What is The Ruby Way to handle these kinds of install issues?

Thanks for any advice.

James Edward Gray II